Rice Lake 420 Plus, 420HE User Manual
420 Plus HMI/420HE Digital Weight Indicator
C7
RESET
R2
C15
C20
C19
R5
MECCA
C3
+5A V
R1
C13
R16
LED2
GND
GD1
C1
F1
DI 2
DI 1
DFB2
TR1
TVS2
TVS3
TVS6
C33
C31
DO2
DO1
C10
C9
+5V
G2E
R25
C30
VR3
R6
C8
U7
C5
C6
U8
R15
U1
LED1
EDP/
RS-232
JP2
C65
U3
SW1
SETUP
C32
C2
XT1
DFB1
TR2
TVS1
TVS5 TVS4
+3. 3
R7
R4
C16
C4
DIGIN
1
J1
LOAD CELL
U2
D1
U19
U6
U9
SERIAL
1
9
11
2
8
1
1
Gn d
20mA+
Gnd
TxD
Gnd
Gn d
DI 2
EXC-
19
20
E XC+
SEN-
SEN+
SIG-
1
5
1
1
1
20mA-
RxD
RxD
TxD
DI 1
SIG+
Micr opr ocesso r
DISPLA Y
DRIVERS
KEYPAD
CONNECTOR
ANALOG
OUTPUT
OPTION CARD
REMOTE
SETUP
SWITCH
DC INPUT
R9
R10
R11
R12
ANA
ME M
AD
HB
J9
J10
U4
OFF TEST
A/D CONVERTER
U10
U11
J2 J3 J4
J7
J8
J11
J12
JP1
J1
4
3
2
1
JP2
POS 1 POS 2
JP 1
POS 1
POS 2
DIGOUT
1
+5V
DO2
Gnd
DO1
J6
R46
R47
U14
JMP3
(Factory Only)
ON
OF F
KEYPAD
CONNECTOR
HE_J2
1
2
B1
+
To be the best by ever y measure
Analog Output Card Installation Instructions
PN 85659
420 Plus Enclosure Disassembly
Ensure power to the indicator is disconnected, then
place the indicator face-down on an antistatic work
mat. Remove the screws that hold the backplate to the
enclosure body. Lift the backplate away from the
enclosure and set it aside.
420HE Enclosure Disassembly
Ensure power to the indicator is disconnected, then
place the indicator on an antistatic work mat. U nhook
the draw latches and open the indicator.
Use a wrist strap to ground yourself and
protect components from electrostatic
discharge (ESD) when working inside
the indicator enclosure.
NOTE: Ensure jumpers JP1 and JP2 are in position 2
(POS2) on the analog output board as shown in
Figure 1.
Mount the analog output module on its standoffs in
the location shown in
Figure 1 and plug the module
input into connector J9 on the CPU board. Connect
output cable to the analog output module as shown in
Table 1, then reassemble the enclosure.
Pin Signal
1 + Current Out
2 – Current Out
3 + Voltage Out
4 – Voltage Out
Table 1. Analog Output Module J1 Pin Assignments
November 2010 PN 85455
Figure 1. Analog Output Module Installation on CPU Board
420 Plus Enclosure Reassembly
1
6
9
4
2
5
7
10
Torque Pattern
8
3
Draw
Latches
Top o f
Indicator
XXXXXXX XXXXXXX ALGOUT DIGIN SETPNT XXXXXXX PROGRM PFORMT SERIAL CALIBR XXXXXXX CONFIG FORMAT
SOURCE
GROSS
0%
20%
OFFSET
ERRACT
FULLSC
HOLD
000000
number
MIN
10000
number
MAX
TWZERO
NET
TWSPAN
ZEROSC
VERS
MINNEG
OFF
ON
MAXNEG
OFF
ON
Once cabling is complete, position the backplate over
the enclosure and reinstall the backplate screws. Use
the torque pattern shown in
distorting the backplate gasket. Torque screws to 15
in-lb (1.7 N-m)
.
Figure 2 to prevent
420HE Enclosure Reassembly
Once cabling is complete, close the front cover of the
indicator and hook the draw latches.
Figure 2. 420 Plus Backplate Torque Pattern
Figure 3. 420HE Enclosure Assembly
Analog Output Calibration
The following calibration procedure requires a multimeter to measure voltage or current output from the analog
output module. No test weights are required for calibration.
NOTE: The analog output must be calibrated after the indicator itself has been configured and calibrated.
Figure 4. Analog Output Menu
1. Enter setup mode and go to the ALGOUT menu
Figure 4).
(see
•Set OFFSET to 0% for 0–10 V output, 20%
for 4–20 mA output
•Set MIN to lowest weight value to be
tracked by the analog output
•Set MAX to highest weight value to be
tracked by the analog output
To enter MIN and MAX values, use the and
keys to select the digit; use the numeric
keypad or the
and to increment or
decrement the value.
2. Connect multimeter to analog output:
• For voltage output, connect voltmeter
leads to pins three and four
• For current output, connect ammeter
leads to pins one and two
3. Adjust zero calibration: Scroll to the TWZERO
parameter. Check voltage or current reading
on multimeter. Press and hold
or to
adjust the zero value up or down.
4. Adjust span calibration: Scroll to the
TWSPAN parameter. Check voltage or
current reading on multimeter. Press and hold
or to adjust the span value up or down.
5. Final zero calibration: Return to the TWZERO
parameter and verify that the zero calibration
has not drifted. Press and hold or to
re-adjust the zero value as required.
6. Return to normal mode. Analog output
function can be verified using test weights.
2 420 Plus/420HE Analog Output Card Installation Instructions
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